Adaptative front light system

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Nov 16, 2018 | 01:14 PM

carrera

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Joined: Nov 2018

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From: Palmela

Adaptative front light system

front light pointing dowm and right pointing left, light in dashboard flashing

Last edited by GGG; Nov 18, 2018 at 12:53 PM.

Nov 17, 2018 | 11:45 AM

Ranchero50

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From: Hagerstown MD

I would find a type specific code reader and try to see what codes the adaptive system is giving. The system has two lamp steering modules, two lamp steering module drivers on the lamp housing and a master chassis controller. For troubleshooting I would pull both lamps and swap them side for side. Just set them on a towel in the lamp opening and plug them in. That'll help isolate the lamp and steering module from the chassis. If the problems follow the lamps, swap out the steering driver on the back of the lamp housing and see what results that gives.

Have you downloaded the free service manuals and wiring diagrams? Makes things much easier to understand.

Nov 17, 2018 | 01:33 PM

Ter11

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Joined: Feb 2018

Posts: 350

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From: Switzerland

Dear Ranchero

Thank you very much for these tips.

I have over the past weeks had the AFS failure come up about 10 times, always with the driver side headlight pointing down when it happens.

Will try to follow your side-swap suggestions. However what makes it difficult, is that the fault usually disappears after 2 ignition on/off cycles.

Br
ter

Nov 17, 2018 | 06:11 PM

tberg

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From: Los Angeles

With the car off, bang the light with an open hand a couple of times, then restart. It should go back to normal. Mine kept going on over several weeks, and each time at another forum member's suggestion, I gave it a good, swift hit in the "eyeball" and it disappeared. It's now been months since it has happened.

Last edited by tberg; Nov 18, 2018 at 09:42 AM.

Nov 18, 2018 | 07:01 AM

Ter11

Senior Member

Joined: Feb 2018

Posts: 350

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From: Switzerland

Quote:

Originally Posted by tberg

With the car off, bang the light with an open hand a couple of times, then restart. It should go back to normal. Mine kept going on over several weeks, and each time at another forum member's suggestion, I bave it a good, swift hit in the "eyeball" and it disappeared. It's now been months since it has happened.

hi Tberg

I also tried that. Usually it worked. But it is difficult to tell for me if the bangs on the headlight are necessary to get it back to work. For the AFS error to clear, 2 ignition cycles are needed anyway I think.

Question: does one of your headlights point down, when the AFS warning light is triggered?

Regards,
ter

Nov 18, 2018 | 08:53 AM

Ranchero50

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Joined: Mar 2017

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From: Hagerstown MD

Quote:

Originally Posted by Ter11

Question: does one of your headlights point down, when the AFS warning light is triggered?

Yep.

Nov 18, 2018 | 09:43 AM

tberg

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Joined: Apr 2011

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From: Los Angeles

ter,
Yes, it was always passenger side headlight.

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Nov 18, 2018 | 11:18 AM

Ter11

Senior Member

Joined: Feb 2018

Posts: 350

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From: Switzerland

Quote:

Originally Posted by tberg

ter,
Yes, it was always passenger side headlight.

@tberg
Thanks. Same here. Always driver side (i.e. left side). And I have only 10k mls on the odo!
If you ever find the root cause for the fault, please publish here. I most certainly have the same problem.

@Ranchero50
Thanks! I understand in your case - as described in your build tread - you pulled the headlight open and found worn wires inside that needed to be repaired to fix the AFS warning light, right?

Depending on the feedback I get when I have the Jag dealer read codes, I will as a next step probably swap the headlight steering module drivers mounted on the back of each headlight side/side, in order to see if that changes the behavior. I just can’t believe that my headlight interior wiring could be bad after only 10k mls.

Br
ter

Last edited by Ter11; Nov 18, 2018 at 11:25 AM.

Nov 19, 2018 | 08:01 AM

Ranchero50

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Joined: Mar 2017

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From: Hagerstown MD

Quote:

Originally Posted by Ter11

Yes, wiring failure on mine. I'd swap the drivers out before taking it to the dealer. Makes it easier on them and less expensive on you if you've already done some of the troubleshooting steps.

Nov 19, 2018 | 10:46 AM

#10

Cee Jay

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From: Kaysville, Utah, US

Quote:

Originally Posted by Ranchero50

Yes, wiring failure on mine. I'd swap the drivers out before taking it to the dealer. Makes it easier on them and less expensive on you if you've already done some of the troubleshooting steps.

HA! I did a whole bunch of troubleshooting on my F150 for a battery drain issue (went deadernshyte not driven for six days or more) and narrowed it down to six possible modules. I THEN took it to the dealer and gave them very detailed information on all my steps and findings, and even brought the truck there with a literally Brand New and 24-hour charged battery. Well, I dropped it off on a Wednesday for Thursday work.... I went back Monday and talked to the same Service Rep. Dude said "Alternator overcharged it, the voltage was at 12.9". Well, DUHHH! Absolutely freshest battery possible. I asked "What other stuff did you check?" The answer; "Nothing, it's the alternator".
GAAAAAAHHHHHHH!!!!!!!!
Flippin' morons didn't even bother to read what I'd left.